parsing_cocci/.#visitor_ast.ml.1.95

   1 (*
   2 * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen
   3 * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller
   4 * This file is part of Coccinelle.
   5 *
   6 * Coccinelle is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, according to version 2 of the License.
   9 *
  10 * Coccinelle is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with Coccinelle.  If not, see <http://www.gnu.org/licenses/>.
  17 *
  18 * The authors reserve the right to distribute this or future versions of
  19 * Coccinelle under other licenses.
  20 *)
  21
  22
  23 module Ast = Ast_cocci
  24
  25 (* --------------------------------------------------------------------- *)
  26 (* Generic traversal: combiner *)
  27 (* parameters:
  28    combining function
  29    treatment of: mcode, identifiers, expressions, fullTypes, types,
  30    declarations, statements, toplevels
  31    default value for options *)
  32
  33 type 'a combiner =
  34     {combiner_ident : Ast.ident -> 'a;
  35      combiner_expression : Ast.expression -> 'a;
  36      combiner_fullType : Ast.fullType -> 'a;
  37      combiner_typeC : Ast.typeC -> 'a;
  38      combiner_declaration : Ast.declaration -> 'a;
  39      combiner_initialiser : Ast.initialiser -> 'a;
  40      combiner_parameter : Ast.parameterTypeDef -> 'a;
  41      combiner_parameter_list : Ast.parameter_list -> 'a;
  42      combiner_rule_elem : Ast.rule_elem -> 'a;
  43      combiner_statement : Ast.statement -> 'a;
  44      combiner_case_line : Ast.case_line -> 'a;
  45      combiner_top_level : Ast.top_level -> 'a;
  46      combiner_anything : Ast.anything  -> 'a;
  47      combiner_expression_dots : Ast.expression Ast.dots -> 'a;
  48      combiner_statement_dots : Ast.statement Ast.dots -> 'a;
  49      combiner_declaration_dots : Ast.declaration Ast.dots -> 'a}
  50
  51 type ('mc,'a) cmcode = 'a combiner -> 'mc Ast_cocci.mcode -> 'a
  52 type ('cd,'a) ccode = 'a combiner -> ('cd -> 'a) -> 'cd -> 'a
  53
  54
  55 let combiner bind option_default
  56     meta_mcodefn string_mcodefn const_mcodefn assign_mcodefn fix_mcodefn
  57     unary_mcodefn binary_mcodefn
  58     cv_mcodefn sign_mcodefn struct_mcodefn storage_mcodefn
  59     inc_file_mcodefn
  60     expdotsfn paramdotsfn stmtdotsfn decldotsfn
  61     identfn exprfn ftfn tyfn initfn paramfn declfn rulefn stmtfn casefn
  62     topfn anyfn =
  63   let multibind l =
  64     let rec loop = function
  65         [] -> option_default
  66       | [x] -> x
  67       | x::xs -> bind x (loop xs) in
  68     loop l in
  69   let get_option f = function
  70       Some x -> f x
  71     | None -> option_default in
  72
  73   let rec meta_mcode x = meta_mcodefn all_functions x
  74   and string_mcode x = string_mcodefn all_functions x
  75   and const_mcode x = const_mcodefn all_functions x
  76   and assign_mcode x = assign_mcodefn all_functions x
  77   and fix_mcode x = fix_mcodefn all_functions x
  78   and unary_mcode x = unary_mcodefn all_functions x
  79   and binary_mcode x = binary_mcodefn all_functions x
  80   and cv_mcode x = cv_mcodefn all_functions x
  81   and sign_mcode x = sign_mcodefn all_functions x
  82   and struct_mcode x = struct_mcodefn all_functions x
  83   and storage_mcode x = storage_mcodefn all_functions x
  84   and inc_file_mcode x = inc_file_mcodefn all_functions x
  85
  86   and expression_dots d =
  87     let k d =
  88       match Ast.unwrap d with
  89         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
  90           multibind (List.map expression l) in
  91     expdotsfn all_functions k d
  92
  93   and parameter_dots d =
  94     let k d =
  95       match Ast.unwrap d with
  96         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
  97           multibind (List.map parameterTypeDef l) in
  98     paramdotsfn all_functions k d
  99
 100   and statement_dots d =
 101     let k d =
 102       match Ast.unwrap d with
 103         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
 104           multibind (List.map statement l) in
 105     stmtdotsfn all_functions k d
 106
 107   and declaration_dots d =
 108     let k d =
 109       match Ast.unwrap d with
 110         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
 111           multibind (List.map declaration l) in
 112     decldotsfn all_functions k d
 113
 114   and ident i =
 115     let k i =
 116       match Ast.unwrap i with
 117         Ast.Id(name) -> string_mcode name
 118       | Ast.MetaId(name,_,_,_) -> meta_mcode name
 119       | Ast.MetaFunc(name,_,_,_) -> meta_mcode name
 120       | Ast.MetaLocalFunc(name,_,_,_) -> meta_mcode name
 121       | Ast.OptIdent(id) -> ident id
 122       | Ast.UniqueIdent(id) -> ident id in
 123     identfn all_functions k i
 124
 125   and expression e =
 126     let k e =
 127       match Ast.unwrap e with
 128         Ast.Ident(id) -> ident id
 129       | Ast.Constant(const) -> const_mcode const
 130       | Ast.FunCall(fn,lp,args,rp) ->
 131           multibind [expression fn; string_mcode lp; expression_dots args;
 132                       string_mcode rp]
 133       | Ast.Assignment(left,op,right,simple) ->
 134           multibind [expression left; assign_mcode op; expression right]
 135       | Ast.CondExpr(exp1,why,exp2,colon,exp3) ->
 136           multibind [expression exp1; string_mcode why;
 137                       get_option expression exp2; string_mcode colon;
 138                       expression exp3]
 139       | Ast.Postfix(exp,op) -> bind (expression exp) (fix_mcode op)
 140       | Ast.Infix(exp,op) -> bind (fix_mcode op) (expression exp)
 141       | Ast.Unary(exp,op) -> bind (unary_mcode op) (expression exp)
 142       | Ast.Binary(left,op,right) ->
 143           multibind [expression left; binary_mcode op; expression right]
 144       | Ast.Nested(left,op,right) ->
 145           multibind [expression left; binary_mcode op; expression right]
 146       | Ast.Paren(lp,exp,rp) ->
 147           multibind [string_mcode lp; expression exp; string_mcode rp]
 148       | Ast.ArrayAccess(exp1,lb,exp2,rb) ->
 149           multibind
 150             [expression exp1; string_mcode lb; expression exp2;
 151               string_mcode rb]
 152       | Ast.RecordAccess(exp,pt,field) ->
 153           multibind [expression exp; string_mcode pt; ident field]
 154       | Ast.RecordPtAccess(exp,ar,field) ->
 155           multibind [expression exp; string_mcode ar; ident field]
 156       | Ast.Cast(lp,ty,rp,exp) ->
 157           multibind
 158             [string_mcode lp; fullType ty; string_mcode rp; expression exp]
 159       | Ast.SizeOfExpr(szf,exp) ->
 160           multibind [string_mcode szf; expression exp]
 161       | Ast.SizeOfType(szf,lp,ty,rp) ->
 162           multibind
 163             [string_mcode szf; string_mcode lp; fullType ty; string_mcode rp]
 164       | Ast.TypeExp(ty) -> fullType ty
 165       | Ast.MetaErr(name,_,_,_)
 166       | Ast.MetaExpr(name,_,_,_,_,_)
 167       | Ast.MetaExprList(name,_,_,_) -> meta_mcode name
 168       | Ast.EComma(cm) -> string_mcode cm
 169       | Ast.DisjExpr(exp_list) -> multibind (List.map expression exp_list)
 170       | Ast.NestExpr(expr_dots,whencode,multi) ->
 171           bind (expression_dots expr_dots) (get_option expression whencode)
 172       | Ast.Edots(dots,whencode) | Ast.Ecircles(dots,whencode)
 173       | Ast.Estars(dots,whencode) ->
 174           bind (string_mcode dots) (get_option expression whencode)
 175       | Ast.OptExp(exp) | Ast.UniqueExp(exp) ->
 176           expression exp in
 177     exprfn all_functions k e
 178
 179   and fullType ft =
 180     let k ft =
 181       match Ast.unwrap ft with
 182         Ast.Type(cv,ty) -> bind (get_option cv_mcode cv) (typeC ty)
 183       | Ast.DisjType(types) -> multibind (List.map fullType types)
 184       | Ast.OptType(ty) -> fullType ty
 185       | Ast.UniqueType(ty) -> fullType ty in
 186     ftfn all_functions k ft
 187
 188   and function_pointer (ty,lp1,star,rp1,lp2,params,rp2) extra =
 189     (* have to put the treatment of the identifier into the right position *)
 190     multibind
 191       ([fullType ty; string_mcode lp1; string_mcode star] @ extra @
 192        [string_mcode rp1;
 193          string_mcode lp2; parameter_dots params; string_mcode rp2])
 194
 195   and function_type (ty,lp1,params,rp1) extra =
 196     (* have to put the treatment of the identifier into the right position *)
 197     multibind
 198       ([get_option fullType ty] @ extra @
 199        [string_mcode lp1; parameter_dots params; string_mcode rp1])
 200
 201   and array_type (ty,lb,size,rb) extra =
 202     multibind
 203       ([fullType ty] @ extra @
 204        [string_mcode lb; get_option expression size; string_mcode rb])
 205
 206   and typeC ty =
 207     let k ty =
 208       match Ast.unwrap ty with
 209         Ast.BaseType(ty,strings) -> multibind (List.map string_mcode strings)
 210       | Ast.SignedT(sgn,ty) -> bind (sign_mcode sgn) (get_option typeC ty)
 211       | Ast.Pointer(ty,star) ->
 212           bind (fullType ty) (string_mcode star)
 213       | Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 214           function_pointer (ty,lp1,star,rp1,lp2,params,rp2) []
 215       | Ast.FunctionType (_,ty,lp1,params,rp1) ->
 216           function_type (ty,lp1,params,rp1) []
 217       | Ast.Array(ty,lb,size,rb) -> array_type (ty,lb,size,rb) []
 218       | Ast.EnumName(kind,name) -> bind (string_mcode kind) (ident name)
 219       | Ast.StructUnionName(kind,name) ->
 220           bind (struct_mcode kind) (get_option ident name)
 221       | Ast.StructUnionDef(ty,lb,decls,rb) ->
 222           multibind
 223             [fullType ty; string_mcode lb; declaration_dots decls;
 224               string_mcode rb]
 225       | Ast.TypeName(name) -> string_mcode name
 226       | Ast.MetaType(name,_,_) -> meta_mcode name in
 227     tyfn all_functions k ty
 228
 229   and named_type ty id =
 230     match Ast.unwrap ty with
 231       Ast.Type(None,ty1) ->
 232         (match Ast.unwrap ty1 with
 233           Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 234             function_pointer (ty,lp1,star,rp1,lp2,params,rp2) [ident id]
 235         | Ast.FunctionType(_,ty,lp1,params,rp1) ->
 236             function_type (ty,lp1,params,rp1) [ident id]
 237         | Ast.Array(ty,lb,size,rb) -> array_type (ty,lb,size,rb) [ident id]
 238         | _ -> bind (fullType ty) (ident id))
 239     | _ -> bind (fullType ty) (ident id)
 240
 241   and declaration d =
 242     let k d =
 243       match Ast.unwrap d with
 244         Ast.Init(stg,ty,id,eq,ini,sem) ->
 245           bind (get_option storage_mcode stg)
 246             (bind (named_type ty id)
 247                (multibind
 248                   [string_mcode eq; initialiser ini; string_mcode sem]))
 249       | Ast.UnInit(stg,ty,id,sem) ->
 250           bind (get_option storage_mcode stg)
 251             (bind (named_type ty id) (string_mcode sem))
 252       | Ast.MacroDecl(name,lp,args,rp,sem) ->
 253           multibind
 254             [ident name; string_mcode lp; expression_dots args;
 255               string_mcode rp; string_mcode sem]
 256       | Ast.TyDecl(ty,sem) -> bind (fullType ty) (string_mcode sem)
 257       | Ast.Typedef(stg,ty,id,sem) ->
 258           bind (string_mcode stg)
 259             (bind (fullType ty) (bind (typeC id) (string_mcode sem)))
 260       | Ast.DisjDecl(decls) -> multibind (List.map declaration decls)
 261       | Ast.Ddots(dots,whencode) ->
 262           bind (string_mcode dots) (get_option declaration whencode)
 263       | Ast.MetaDecl(name,_,_) -> meta_mcode name
 264       | Ast.OptDecl(decl) -> declaration decl
 265       | Ast.UniqueDecl(decl) -> declaration decl in
 266     declfn all_functions k d
 267
 268   and initialiser i =
 269     let k i =
 270       match Ast.unwrap i with
 271         Ast.InitExpr(exp) -> expression exp
 272       | Ast.InitList(lb,initlist,rb,whencode) ->
 273           multibind
 274             [string_mcode lb;
 275               multibind (List.map initialiser initlist);
 276               string_mcode rb;
 277               multibind (List.map initialiser whencode)]
 278       | Ast.InitGccDotName(dot,name,eq,ini) ->
 279           multibind
 280             [string_mcode dot; ident name; string_mcode eq; initialiser ini]
 281       | Ast.InitGccName(name,eq,ini) ->
 282           multibind [ident name; string_mcode eq; initialiser ini]
 283       | Ast.InitGccIndex(lb,exp,rb,eq,ini) ->
 284           multibind
 285             [string_mcode lb; expression exp; string_mcode rb;
 286               string_mcode eq; initialiser ini]
 287       | Ast.InitGccRange(lb,exp1,dots,exp2,rb,eq,ini) ->
 288           multibind
 289             [string_mcode lb; expression exp1; string_mcode dots;
 290               expression exp2; string_mcode rb; string_mcode eq;
 291               initialiser ini]
 292       | Ast.IComma(cm) -> string_mcode cm
 293       | Ast.OptIni(i) -> initialiser i
 294       | Ast.UniqueIni(i) -> initialiser i in
 295     initfn all_functions k i
 296
 297   and parameterTypeDef p =
 298     let k p =
 299       match Ast.unwrap p with
 300         Ast.VoidParam(ty) -> fullType ty
 301       | Ast.Param(ty,Some id) -> named_type ty id
 302       | Ast.Param(ty,None) -> fullType ty
 303       | Ast.MetaParam(name,_,_) -> meta_mcode name
 304       | Ast.MetaParamList(name,_,_,_) -> meta_mcode name
 305       | Ast.PComma(cm) -> string_mcode cm
 306       | Ast.Pdots(dots) -> string_mcode dots
 307       | Ast.Pcircles(dots) -> string_mcode dots
 308       | Ast.OptParam(param) -> parameterTypeDef param
 309       | Ast.UniqueParam(param) -> parameterTypeDef param in
 310     paramfn all_functions k p
 311
 312   and rule_elem re =
 313     let k re =
 314       match Ast.unwrap re with
 315         Ast.FunHeader(_,_,fi,name,lp,params,rp) ->
 316           multibind
 317             ((List.map fninfo fi) @
 318              [ident name;string_mcode lp;parameter_dots params;
 319                string_mcode rp])
 320       | Ast.Decl(_,_,decl) -> declaration decl
 321       | Ast.SeqStart(brace) -> string_mcode brace
 322       | Ast.SeqEnd(brace) -> string_mcode brace
 323       | Ast.ExprStatement(exp,sem) ->
 324           bind (expression exp) (string_mcode sem)
 325       | Ast.IfHeader(iff,lp,exp,rp) ->
 326           multibind [string_mcode iff; string_mcode lp; expression exp;
 327                       string_mcode rp]
 328       | Ast.Else(els) -> string_mcode els
 329       | Ast.WhileHeader(whl,lp,exp,rp) ->
 330           multibind [string_mcode whl; string_mcode lp; expression exp;
 331                       string_mcode rp]
 332       | Ast.DoHeader(d) -> string_mcode d
 333       | Ast.WhileTail(whl,lp,exp,rp,sem) ->
 334           multibind [string_mcode whl; string_mcode lp; expression exp;
 335                       string_mcode rp; string_mcode sem]
 336       | Ast.ForHeader(fr,lp,e1,sem1,e2,sem2,e3,rp) ->
 337           multibind [string_mcode fr; string_mcode lp;
 338                       get_option expression e1; string_mcode sem1;
 339                       get_option expression e2; string_mcode sem2;
 340                       get_option expression e3; string_mcode rp]
 341       | Ast.IteratorHeader(nm,lp,args,rp) ->
 342           multibind [ident nm; string_mcode lp;
 343                       expression_dots args; string_mcode rp]
 344       | Ast.SwitchHeader(switch,lp,exp,rp) ->
 345           multibind [string_mcode switch; string_mcode lp; expression exp;
 346                       string_mcode rp]
 347       | Ast.Break(br,sem) -> bind (string_mcode br) (string_mcode sem)
 348       | Ast.Continue(cont,sem) -> bind (string_mcode cont) (string_mcode sem)
 349       | Ast.Label(l,dd) -> bind (ident l) (string_mcode dd)
 350       | Ast.Goto(goto,l,sem) ->
 351           bind (string_mcode goto) (bind (ident l) (string_mcode sem))
 352       | Ast.Return(ret,sem) -> bind (string_mcode ret) (string_mcode sem)
 353       | Ast.ReturnExpr(ret,exp,sem) ->
 354           multibind [string_mcode ret; expression exp; string_mcode sem]
 355       | Ast.MetaStmt(name,_,_,_) -> meta_mcode name
 356       | Ast.MetaStmtList(name,_,_) -> meta_mcode name
 357       | Ast.MetaRuleElem(name,_,_) -> meta_mcode name
 358       | Ast.Exp(exp) -> expression exp
 359       | Ast.TopExp(exp) -> expression exp
 360       | Ast.Ty(ty) -> fullType ty
 361       | Ast.TopInit(init) -> initialiser init
 362       | Ast.Include(inc,name) -> bind (string_mcode inc) (inc_file_mcode name)
 363       | Ast.DefineHeader(def,id,params) ->
 364           multibind [string_mcode def; ident id; define_parameters params]
 365       | Ast.Default(def,colon) -> bind (string_mcode def) (string_mcode colon)
 366       | Ast.Case(case,exp,colon) ->
 367           multibind [string_mcode case; expression exp; string_mcode colon]
 368       | Ast.DisjRuleElem(res) -> multibind (List.map rule_elem res) in
 369     rulefn all_functions k re
 370
 371   (* not parameterizable for now... *)
 372   and define_parameters p =
 373     let k p =
 374       match Ast.unwrap p with
 375         Ast.NoParams -> option_default
 376       | Ast.DParams(lp,params,rp) ->
 377           multibind
 378             [string_mcode lp; define_param_dots params; string_mcode rp] in
 379     k p
 380
 381   and define_param_dots d =
 382     let k d =
 383       match Ast.unwrap d with
 384         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
 385           multibind (List.map define_param l) in
 386     k d
 387
 388   and define_param p =
 389     let k p =
 390       match Ast.unwrap p with
 391         Ast.DParam(id) -> ident id
 392       | Ast.DPComma(comma) -> string_mcode comma
 393       | Ast.DPdots(d) -> string_mcode d
 394       | Ast.DPcircles(c) -> string_mcode c
 395       | Ast.OptDParam(dp) -> define_param dp
 396       | Ast.UniqueDParam(dp) -> define_param dp in
 397     k p
 398
 399   (* discard the result, because the statement is assumed to be already
 400      represented elsewhere in the code *)
 401   and process_bef_aft s =
 402     match Ast.get_dots_bef_aft s with
 403       Ast.NoDots -> ()
 404     | Ast.DroppingBetweenDots(stm,ind) -> let _ = statement stm in ()
 405     | Ast.AddingBetweenDots(stm,ind) -> let _ = statement stm in ()
 406
 407   and statement s =
 408     process_bef_aft s;
 409     let k s =
 410       match Ast.unwrap s with
 411         Ast.Seq(lbrace,decls,body,rbrace) ->
 412           multibind [rule_elem lbrace; statement_dots decls;
 413                       statement_dots body; rule_elem rbrace]
 414       | Ast.IfThen(header,branch,_) ->
 415           multibind [rule_elem header; statement branch]
 416       | Ast.IfThenElse(header,branch1,els,branch2,_) ->
 417           multibind [rule_elem header; statement branch1; rule_elem els;
 418                       statement branch2]
 419       | Ast.While(header,body,_) ->
 420           multibind [rule_elem header; statement body]
 421       | Ast.Do(header,body,tail) ->
 422           multibind [rule_elem header; statement body; rule_elem tail]
 423       | Ast.For(header,body,_) -> multibind [rule_elem header; statement body]
 424       | Ast.Iterator(header,body,_) ->
 425           multibind [rule_elem header; statement body]
 426       | Ast.Switch(header,lb,cases,rb) ->
 427           multibind [rule_elem header;rule_elem lb;
 428                       multibind (List.map case_line cases);
 429                       rule_elem rb]
 430       | Ast.Atomic(re) -> rule_elem re
 431       | Ast.Disj(stmt_dots_list) ->
 432           multibind (List.map statement_dots stmt_dots_list)
 433       | Ast.Nest(stmt_dots,whn,_,_,_) ->
 434           bind (statement_dots stmt_dots)
 435             (multibind (List.map (whencode statement_dots statement) whn))
 436       | Ast.FunDecl(header,lbrace,decls,body,rbrace) ->
 437           multibind [rule_elem header; rule_elem lbrace;
 438                       statement_dots decls; statement_dots body;
 439                       rule_elem rbrace]
 440       | Ast.Define(header,body) ->
 441           bind (rule_elem header) (statement_dots body)
 442       | Ast.Dots(d,whn,_,_) | Ast.Circles(d,whn,_,_) | Ast.Stars(d,whn,_,_) ->
 443           bind (string_mcode d)
 444             (multibind (List.map (whencode statement_dots statement) whn))
 445       | Ast.OptStm(stmt) | Ast.UniqueStm(stmt) ->
 446           statement stmt in
 447     stmtfn all_functions k s
 448
 449   and fninfo = function
 450       Ast.FStorage(stg) -> storage_mcode stg
 451     | Ast.FType(ty) -> fullType ty
 452     | Ast.FInline(inline) -> string_mcode inline
 453     | Ast.FAttr(attr) -> string_mcode attr
 454
 455   and whencode notfn alwaysfn = function
 456       Ast.WhenNot a -> notfn a
 457     | Ast.WhenAlways a -> alwaysfn a
 458     | Ast.WhenModifier(_) -> option_default
 459     | Ast.WhenNotTrue(e) -> rule_elem e
 460     | Ast.WhenNotFalse(e) -> rule_elem e
 461
 462   and case_line c =
 463     let k c =
 464       match Ast.unwrap c with
 465         Ast.CaseLine(header,code) ->
 466           bind (rule_elem header) (statement_dots code)
 467       | Ast.OptCase(case) -> case_line case in
 468     casefn all_functions k c
 469
 470   and top_level t =
 471     let k t =
 472       match Ast.unwrap t with
 473         Ast.FILEINFO(old_file,new_file) ->
 474           bind (string_mcode old_file) (string_mcode new_file)
 475       | Ast.DECL(stmt) -> statement stmt
 476       | Ast.CODE(stmt_dots) -> statement_dots stmt_dots
 477       | Ast.ERRORWORDS(exps) -> multibind (List.map expression exps) in
 478     topfn all_functions k t
 479
 480   and anything a =
 481     let k = function
 482         (*in many cases below, the thing is not even mcode, so we do nothing*)
 483         Ast.FullTypeTag(ft) -> fullType ft
 484       | Ast.BaseTypeTag(bt) -> option_default
 485       | Ast.StructUnionTag(su) -> option_default
 486       | Ast.SignTag(sgn) -> option_default
 487       | Ast.IdentTag(id) -> ident id
 488       | Ast.ExpressionTag(exp) -> expression exp
 489       | Ast.ConstantTag(cst) -> option_default
 490       | Ast.UnaryOpTag(unop) -> option_default
 491       | Ast.AssignOpTag(asgnop) -> option_default
 492       | Ast.FixOpTag(fixop) -> option_default
 493       | Ast.BinaryOpTag(binop) -> option_default
 494       | Ast.ArithOpTag(arithop) -> option_default
 495       | Ast.LogicalOpTag(logop) -> option_default
 496       | Ast.DeclarationTag(decl) -> declaration decl
 497       | Ast.InitTag(ini) -> initialiser ini
 498       | Ast.StorageTag(stg) -> option_default
 499       | Ast.IncFileTag(stg) -> option_default
 500       | Ast.Rule_elemTag(rule) -> rule_elem rule
 501       | Ast.StatementTag(rule) -> statement rule
 502       | Ast.CaseLineTag(case) -> case_line case
 503       | Ast.ConstVolTag(cv) -> option_default
 504       | Ast.Token(tok,info) -> option_default
 505       | Ast.Code(cd) -> top_level cd
 506       | Ast.ExprDotsTag(ed) -> expression_dots ed
 507       | Ast.ParamDotsTag(pd) -> parameter_dots pd
 508       | Ast.StmtDotsTag(sd) -> statement_dots sd
 509       | Ast.DeclDotsTag(sd) -> declaration_dots sd
 510       | Ast.TypeCTag(ty) -> typeC ty
 511       | Ast.ParamTag(param) -> parameterTypeDef param
 512       | Ast.SgrepStartTag(tok) -> option_default
 513       | Ast.SgrepEndTag(tok) -> option_default in
 514     anyfn all_functions k a
 515
 516   and all_functions =
 517     {combiner_ident = ident;
 518       combiner_expression = expression;
 519       combiner_fullType = fullType;
 520       combiner_typeC = typeC;
 521       combiner_declaration = declaration;
 522       combiner_initialiser = initialiser;
 523       combiner_parameter = parameterTypeDef;
 524       combiner_parameter_list = parameter_dots;
 525       combiner_rule_elem = rule_elem;
 526       combiner_statement = statement;
 527       combiner_case_line = case_line;
 528       combiner_top_level = top_level;
 529       combiner_anything = anything;
 530       combiner_expression_dots = expression_dots;
 531       combiner_statement_dots = statement_dots;
 532       combiner_declaration_dots = declaration_dots} in
 533   all_functions
 534
 535 (* ---------------------------------------------------------------------- *)
 536
 537 type 'a inout = 'a -> 'a (* for specifying the type of rebuilder *)
 538
 539 type rebuilder =
 540     {rebuilder_ident : Ast.ident inout;
 541       rebuilder_expression : Ast.expression inout;
 542       rebuilder_fullType : Ast.fullType inout;
 543       rebuilder_typeC : Ast.typeC inout;
 544       rebuilder_declaration : Ast.declaration inout;
 545       rebuilder_initialiser : Ast.initialiser inout;
 546       rebuilder_parameter : Ast.parameterTypeDef inout;
 547       rebuilder_parameter_list : Ast.parameter_list inout;
 548       rebuilder_statement : Ast.statement inout;
 549       rebuilder_case_line : Ast.case_line inout;
 550       rebuilder_rule_elem : Ast.rule_elem inout;
 551       rebuilder_top_level : Ast.top_level inout;
 552       rebuilder_expression_dots : Ast.expression Ast.dots inout;
 553       rebuilder_statement_dots : Ast.statement Ast.dots inout;
 554       rebuilder_declaration_dots : Ast.declaration Ast.dots inout;
 555       rebuilder_define_param_dots : Ast.define_param Ast.dots inout;
 556       rebuilder_define_param : Ast.define_param inout;
 557       rebuilder_define_parameters : Ast.define_parameters inout;
 558       rebuilder_anything : Ast.anything inout}
 559
 560 type 'mc rmcode = 'mc Ast.mcode inout
 561 type 'cd rcode = rebuilder -> ('cd inout) -> 'cd inout
 562
 563
 564 let rebuilder
 565     meta_mcode string_mcode const_mcode assign_mcode fix_mcode unary_mcode
 566     binary_mcode cv_mcode sign_mcode struct_mcode storage_mcode
 567     inc_file_mcode
 568     expdotsfn paramdotsfn stmtdotsfn decldotsfn
 569     identfn exprfn ftfn tyfn initfn paramfn declfn rulefn stmtfn casefn
 570     topfn anyfn =
 571   let get_option f = function
 572       Some x -> Some (f x)
 573     | None -> None in
 574   let rec expression_dots d =
 575     let k d =
 576       Ast.rewrap d
 577         (match Ast.unwrap d with
 578           Ast.DOTS(l) -> Ast.DOTS(List.map expression l)
 579         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map expression l)
 580         | Ast.STARS(l) -> Ast.STARS(List.map expression l)) in
 581     expdotsfn all_functions k d
 582
 583   and parameter_dots d =
 584     let k d =
 585       Ast.rewrap d
 586         (match Ast.unwrap d with
 587           Ast.DOTS(l) -> Ast.DOTS(List.map parameterTypeDef l)
 588         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map parameterTypeDef l)
 589         | Ast.STARS(l) -> Ast.STARS(List.map parameterTypeDef l)) in
 590     paramdotsfn all_functions k d
 591
 592   and statement_dots d =
 593     let k d =
 594       Ast.rewrap d
 595         (match Ast.unwrap d with
 596           Ast.DOTS(l) -> Ast.DOTS(List.map statement l)
 597         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map statement l)
 598         | Ast.STARS(l) -> Ast.STARS(List.map statement l)) in
 599     stmtdotsfn all_functions k d
 600
 601   and declaration_dots d =
 602     let k d =
 603       Ast.rewrap d
 604         (match Ast.unwrap d with
 605           Ast.DOTS(l) -> Ast.DOTS(List.map declaration l)
 606         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map declaration l)
 607         | Ast.STARS(l) -> Ast.STARS(List.map declaration l)) in
 608     decldotsfn all_functions k d
 609
 610   and ident i =
 611     let k i =
 612       Ast.rewrap i
 613         (match Ast.unwrap i with
 614           Ast.Id(name) -> Ast.Id(string_mcode name)
 615         | Ast.MetaId(name,constraints,keep,inherited) ->
 616             Ast.MetaId(meta_mcode name,constraints,keep,inherited)
 617         | Ast.MetaFunc(name,constraints,keep,inherited) ->
 618             Ast.MetaFunc(meta_mcode name,constraints,keep,inherited)
 619         | Ast.MetaLocalFunc(name,constraints,keep,inherited) ->
 620             Ast.MetaLocalFunc(meta_mcode name,constraints,keep,inherited)
 621         | Ast.OptIdent(id) -> Ast.OptIdent(ident id)
 622         | Ast.UniqueIdent(id) -> Ast.UniqueIdent(ident id)) in
 623     identfn all_functions k i
 624
 625   and expression e =
 626     let k e =
 627       Ast.rewrap e
 628         (match Ast.unwrap e with
 629           Ast.Ident(id) -> Ast.Ident(ident id)
 630         | Ast.Constant(const) -> Ast.Constant(const_mcode const)
 631         | Ast.FunCall(fn,lp,args,rp) ->
 632             Ast.FunCall(expression fn, string_mcode lp, expression_dots args,
 633                         string_mcode rp)
 634         | Ast.Assignment(left,op,right,simple) ->
 635             Ast.Assignment(expression left, assign_mcode op, expression right,
 636                            simple)
 637         | Ast.CondExpr(exp1,why,exp2,colon,exp3) ->
 638             Ast.CondExpr(expression exp1, string_mcode why,
 639                          get_option expression exp2, string_mcode colon,
 640                          expression exp3)
 641         | Ast.Postfix(exp,op) -> Ast.Postfix(expression exp,fix_mcode op)
 642         | Ast.Infix(exp,op) -> Ast.Infix(expression exp,fix_mcode op)
 643         | Ast.Unary(exp,op) -> Ast.Unary(expression exp,unary_mcode op)
 644         | Ast.Binary(left,op,right) ->
 645             Ast.Binary(expression left, binary_mcode op, expression right)
 646         | Ast.Nested(left,op,right) ->
 647             Ast.Nested(expression left, binary_mcode op, expression right)
 648         | Ast.Paren(lp,exp,rp) ->
 649             Ast.Paren(string_mcode lp, expression exp, string_mcode rp)
 650         | Ast.ArrayAccess(exp1,lb,exp2,rb) ->
 651             Ast.ArrayAccess(expression exp1, string_mcode lb, expression exp2,
 652                             string_mcode rb)
 653         | Ast.RecordAccess(exp,pt,field) ->
 654             Ast.RecordAccess(expression exp, string_mcode pt, ident field)
 655         | Ast.RecordPtAccess(exp,ar,field) ->
 656             Ast.RecordPtAccess(expression exp, string_mcode ar, ident field)
 657         | Ast.Cast(lp,ty,rp,exp) ->
 658             Ast.Cast(string_mcode lp, fullType ty, string_mcode rp,
 659                      expression exp)
 660         | Ast.SizeOfExpr(szf,exp) ->
 661             Ast.SizeOfExpr(string_mcode szf, expression exp)
 662         | Ast.SizeOfType(szf,lp,ty,rp) ->
 663             Ast.SizeOfType(string_mcode szf,string_mcode lp, fullType ty,
 664                            string_mcode rp)
 665         | Ast.TypeExp(ty) -> Ast.TypeExp(fullType ty)
 666         | Ast.MetaErr(name,constraints,keep,inherited) ->
 667             Ast.MetaErr(meta_mcode name,constraints,keep,inherited)
 668         | Ast.MetaExpr(name,constraints,keep,ty,form,inherited) ->
 669             Ast.MetaExpr(meta_mcode name,constraints,keep,ty,form,inherited)
 670         | Ast.MetaExprList(name,lenname_inh,keep,inherited) ->
 671             Ast.MetaExprList(meta_mcode name,lenname_inh,keep,inherited)
 672         | Ast.EComma(cm) -> Ast.EComma(string_mcode cm)
 673         | Ast.DisjExpr(exp_list) -> Ast.DisjExpr(List.map expression exp_list)
 674         | Ast.NestExpr(expr_dots,whencode,multi) ->
 675             Ast.NestExpr(expression_dots expr_dots,
 676                          get_option expression whencode,multi)
 677         | Ast.Edots(dots,whencode) ->
 678             Ast.Edots(string_mcode dots,get_option expression whencode)
 679         | Ast.Ecircles(dots,whencode) ->
 680             Ast.Ecircles(string_mcode dots,get_option expression whencode)
 681         | Ast.Estars(dots,whencode) ->
 682             Ast.Estars(string_mcode dots,get_option expression whencode)
 683         | Ast.OptExp(exp) -> Ast.OptExp(expression exp)
 684         | Ast.UniqueExp(exp) -> Ast.UniqueExp(expression exp)) in
 685     exprfn all_functions k e
 686
 687   and fullType ft =
 688     let k ft =
 689       Ast.rewrap ft
 690         (match Ast.unwrap ft with
 691           Ast.Type(cv,ty) -> Ast.Type (get_option cv_mcode cv, typeC ty)
 692         | Ast.DisjType(types) -> Ast.DisjType(List.map fullType types)
 693         | Ast.OptType(ty) -> Ast.OptType(fullType ty)
 694         | Ast.UniqueType(ty) -> Ast.UniqueType(fullType ty)) in
 695     ftfn all_functions k ft
 696
 697   and typeC ty =
 698     let k ty =
 699       Ast.rewrap ty
 700         (match Ast.unwrap ty with
 701           Ast.BaseType(ty,strings) ->
 702             Ast.BaseType (ty, List.map string_mcode strings)
 703         | Ast.SignedT(sgn,ty) ->
 704             Ast.SignedT(sign_mcode sgn,get_option typeC ty)
 705         | Ast.Pointer(ty,star) ->
 706             Ast.Pointer (fullType ty, string_mcode star)
 707         | Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 708             Ast.FunctionPointer(fullType ty,string_mcode lp1,string_mcode star,
 709                                 string_mcode rp1,string_mcode lp2,
 710                                 parameter_dots params,
 711                                 string_mcode rp2)
 712         | Ast.FunctionType(allminus,ty,lp,params,rp) ->
 713             Ast.FunctionType(allminus,get_option fullType ty,string_mcode lp,
 714                              parameter_dots params,string_mcode rp)
 715         | Ast.Array(ty,lb,size,rb) ->
 716             Ast.Array(fullType ty, string_mcode lb,
 717                       get_option expression size, string_mcode rb)
 718         | Ast.EnumName(kind,name) ->
 719             Ast.EnumName(string_mcode kind, ident name)
 720         | Ast.StructUnionName(kind,name) ->
 721             Ast.StructUnionName (struct_mcode kind, get_option ident name)
 722         | Ast.StructUnionDef(ty,lb,decls,rb) ->
 723             Ast.StructUnionDef (fullType ty,
 724                                 string_mcode lb, declaration_dots decls,
 725                                 string_mcode rb)
 726         | Ast.TypeName(name) -> Ast.TypeName(string_mcode name)
 727         | Ast.MetaType(name,keep,inherited) ->
 728             Ast.MetaType(meta_mcode name,keep,inherited)) in
 729     tyfn all_functions k ty
 730
 731   and declaration d =
 732     let k d =
 733       Ast.rewrap d
 734         (match Ast.unwrap d with
 735           Ast.Init(stg,ty,id,eq,ini,sem) ->
 736             Ast.Init(get_option storage_mcode stg, fullType ty, ident id,
 737                      string_mcode eq, initialiser ini, string_mcode sem)
 738         | Ast.UnInit(stg,ty,id,sem) ->
 739             Ast.UnInit(get_option storage_mcode stg, fullType ty, ident id,
 740                        string_mcode sem)
 741         | Ast.MacroDecl(name,lp,args,rp,sem) ->
 742             Ast.MacroDecl(ident name, string_mcode lp, expression_dots args,
 743                           string_mcode rp,string_mcode sem)
 744         | Ast.TyDecl(ty,sem) -> Ast.TyDecl(fullType ty, string_mcode sem)
 745         | Ast.Typedef(stg,ty,id,sem) ->
 746             Ast.Typedef(string_mcode stg, fullType ty, typeC id,
 747                         string_mcode sem)
 748         | Ast.DisjDecl(decls) -> Ast.DisjDecl(List.map declaration decls)
 749         | Ast.Ddots(dots,whencode) ->
 750             Ast.Ddots(string_mcode dots, get_option declaration whencode)
 751         | Ast.MetaDecl(name,keep,inherited) ->
 752             Ast.MetaDecl(meta_mcode name,keep,inherited)
 753         | Ast.OptDecl(decl) -> Ast.OptDecl(declaration decl)
 754         | Ast.UniqueDecl(decl) -> Ast.UniqueDecl(declaration decl)) in
 755     declfn all_functions k d
 756
 757   and initialiser i =
 758     let k i =
 759       Ast.rewrap i
 760         (match Ast.unwrap i with
 761           Ast.InitExpr(exp) -> Ast.InitExpr(expression exp)
 762         | Ast.InitList(lb,initlist,rb,whencode) ->
 763             Ast.InitList(string_mcode lb, List.map initialiser initlist,
 764                          string_mcode rb, List.map initialiser whencode)
 765         | Ast.InitGccDotName(dot,name,eq,ini) ->
 766             Ast.InitGccDotName
 767               (string_mcode dot, ident name, string_mcode eq, initialiser ini)
 768         | Ast.InitGccName(name,eq,ini) ->
 769             Ast.InitGccName(ident name, string_mcode eq, initialiser ini)
 770         | Ast.InitGccIndex(lb,exp,rb,eq,ini) ->
 771             Ast.InitGccIndex
 772               (string_mcode lb, expression exp, string_mcode rb,
 773                string_mcode eq, initialiser ini)
 774         | Ast.InitGccRange(lb,exp1,dots,exp2,rb,eq,ini) ->
 775             Ast.InitGccRange
 776               (string_mcode lb, expression exp1, string_mcode dots,
 777                expression exp2, string_mcode rb, string_mcode eq,
 778                initialiser ini)
 779         | Ast.IComma(cm) -> Ast.IComma(string_mcode cm)
 780         | Ast.OptIni(i) -> Ast.OptIni(initialiser i)
 781         | Ast.UniqueIni(i) -> Ast.UniqueIni(initialiser i)) in
 782     initfn all_functions k i
 783
 784   and parameterTypeDef p =
 785     let k p =
 786       Ast.rewrap p
 787         (match Ast.unwrap p with
 788           Ast.VoidParam(ty) -> Ast.VoidParam(fullType ty)
 789         | Ast.Param(ty,id) -> Ast.Param(fullType ty, get_option ident id)
 790         | Ast.MetaParam(name,keep,inherited) ->
 791             Ast.MetaParam(meta_mcode name,keep,inherited)
 792         | Ast.MetaParamList(name,lenname_inh,keep,inherited) ->
 793             Ast.MetaParamList(meta_mcode name,lenname_inh,keep,inherited)
 794         | Ast.PComma(cm) -> Ast.PComma(string_mcode cm)
 795         | Ast.Pdots(dots) -> Ast.Pdots(string_mcode dots)
 796         | Ast.Pcircles(dots) -> Ast.Pcircles(string_mcode dots)
 797         | Ast.OptParam(param) -> Ast.OptParam(parameterTypeDef param)
 798         | Ast.UniqueParam(param) -> Ast.UniqueParam(parameterTypeDef param)) in
 799     paramfn all_functions k p
 800
 801   and rule_elem re =
 802     let k re =
 803       Ast.rewrap re
 804         (match Ast.unwrap re with
 805           Ast.FunHeader(bef,allminus,fi,name,lp,params,rp) ->
 806             Ast.FunHeader(bef,allminus,List.map fninfo fi,ident name,
 807                           string_mcode lp, parameter_dots params,
 808                           string_mcode rp)
 809         | Ast.Decl(bef,allminus,decl) ->
 810             Ast.Decl(bef,allminus,declaration decl)
 811         | Ast.SeqStart(brace) -> Ast.SeqStart(string_mcode brace)
 812         | Ast.SeqEnd(brace) -> Ast.SeqEnd(string_mcode brace)
 813         | Ast.ExprStatement(exp,sem) ->
 814             Ast.ExprStatement (expression exp, string_mcode sem)
 815         | Ast.IfHeader(iff,lp,exp,rp) ->
 816             Ast.IfHeader(string_mcode iff, string_mcode lp, expression exp,
 817               string_mcode rp)
 818         | Ast.Else(els) -> Ast.Else(string_mcode els)
 819         | Ast.WhileHeader(whl,lp,exp,rp) ->
 820             Ast.WhileHeader(string_mcode whl, string_mcode lp, expression exp,
 821                             string_mcode rp)
 822         | Ast.DoHeader(d) -> Ast.DoHeader(string_mcode d)
 823         | Ast.WhileTail(whl,lp,exp,rp,sem) ->
 824             Ast.WhileTail(string_mcode whl, string_mcode lp, expression exp,
 825                           string_mcode rp, string_mcode sem)
 826         | Ast.ForHeader(fr,lp,e1,sem1,e2,sem2,e3,rp) ->
 827             Ast.ForHeader(string_mcode fr, string_mcode lp,
 828                           get_option expression e1, string_mcode sem1,
 829                           get_option expression e2, string_mcode sem2,
 830                           get_option expression e3, string_mcode rp)
 831         | Ast.IteratorHeader(whl,lp,args,rp) ->
 832             Ast.IteratorHeader(ident whl, string_mcode lp,
 833                                expression_dots args, string_mcode rp)
 834         | Ast.SwitchHeader(switch,lp,exp,rp) ->
 835             Ast.SwitchHeader(string_mcode switch, string_mcode lp,
 836                              expression exp, string_mcode rp)
 837         | Ast.Break(br,sem) ->
 838             Ast.Break(string_mcode br, string_mcode sem)
 839         | Ast.Continue(cont,sem) ->
 840             Ast.Continue(string_mcode cont, string_mcode sem)
 841         | Ast.Label(l,dd) -> Ast.Label(ident l, string_mcode dd)
 842         | Ast.Goto(goto,l,sem) ->
 843             Ast.Goto(string_mcode goto,ident l,string_mcode sem)
 844         | Ast.Return(ret,sem) ->
 845             Ast.Return(string_mcode ret, string_mcode sem)
 846         | Ast.ReturnExpr(ret,exp,sem) ->
 847             Ast.ReturnExpr(string_mcode ret, expression exp, string_mcode sem)
 848         | Ast.MetaStmt(name,keep,seqible,inherited) ->
 849             Ast.MetaStmt(meta_mcode name,keep,seqible,inherited)
 850         | Ast.MetaStmtList(name,keep,inherited) ->
 851             Ast.MetaStmtList(meta_mcode name,keep,inherited)
 852         | Ast.MetaRuleElem(name,keep,inherited) ->
 853             Ast.MetaRuleElem(meta_mcode name,keep,inherited)
 854         | Ast.Exp(exp) -> Ast.Exp(expression exp)
 855         | Ast.TopExp(exp) -> Ast.TopExp(expression exp)
 856         | Ast.Ty(ty) -> Ast.Ty(fullType ty)
 857         | Ast.TopInit(init) -> Ast.TopInit(initialiser init)
 858         | Ast.Include(inc,name) ->
 859             Ast.Include(string_mcode inc,inc_file_mcode name)
 860         | Ast.DefineHeader(def,id,params) ->
 861             Ast.DefineHeader(string_mcode def,ident id,
 862                              define_parameters params)
 863         | Ast.Default(def,colon) ->
 864             Ast.Default(string_mcode def,string_mcode colon)
 865         | Ast.Case(case,exp,colon) ->
 866             Ast.Case(string_mcode case,expression exp,string_mcode colon)
 867         | Ast.DisjRuleElem(res) -> Ast.DisjRuleElem(List.map rule_elem res)) in
 868     rulefn all_functions k re
 869
 870   (* not parameterizable for now... *)
 871   and define_parameters p =
 872     let k p =
 873       Ast.rewrap p
 874         (match Ast.unwrap p with
 875           Ast.NoParams -> Ast.NoParams
 876         | Ast.DParams(lp,params,rp) ->
 877             Ast.DParams(string_mcode lp,define_param_dots params,
 878                         string_mcode rp)) in
 879     k p
 880
 881   and define_param_dots d =
 882     let k d =
 883       Ast.rewrap d
 884         (match Ast.unwrap d with
 885           Ast.DOTS(l) -> Ast.DOTS(List.map define_param l)
 886         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map define_param l)
 887         | Ast.STARS(l) -> Ast.STARS(List.map define_param l)) in
 888     k d
 889
 890   and define_param p =
 891     let k p =
 892       Ast.rewrap p
 893         (match Ast.unwrap p with
 894           Ast.DParam(id) -> Ast.DParam(ident id)
 895         | Ast.DPComma(comma) -> Ast.DPComma(string_mcode comma)
 896         | Ast.DPdots(d) -> Ast.DPdots(string_mcode d)
 897         | Ast.DPcircles(c) -> Ast.DPcircles(string_mcode c)
 898         | Ast.OptDParam(dp) -> Ast.OptDParam(define_param dp)
 899         | Ast.UniqueDParam(dp) -> Ast.UniqueDParam(define_param dp)) in
 900     k p
 901
 902   and process_bef_aft s =
 903     Ast.set_dots_bef_aft
 904       (match Ast.get_dots_bef_aft s with
 905         Ast.NoDots -> Ast.NoDots
 906       | Ast.DroppingBetweenDots(stm,ind) ->
 907           Ast.DroppingBetweenDots(statement stm,ind)
 908       | Ast.AddingBetweenDots(stm,ind) ->
 909           Ast.AddingBetweenDots(statement stm,ind))
 910       s
 911
 912   and statement s =
 913     let k s =
 914       Ast.rewrap s
 915         (match Ast.unwrap s with
 916           Ast.Seq(lbrace,decls,body,rbrace) ->
 917             Ast.Seq(rule_elem lbrace, statement_dots decls,
 918                     statement_dots body, rule_elem rbrace)
 919         | Ast.IfThen(header,branch,aft) ->
 920             Ast.IfThen(rule_elem header, statement branch,aft)
 921         | Ast.IfThenElse(header,branch1,els,branch2,aft) ->
 922             Ast.IfThenElse(rule_elem header, statement branch1, rule_elem els,
 923                            statement branch2, aft)
 924         | Ast.While(header,body,aft) ->
 925             Ast.While(rule_elem header, statement body, aft)
 926         | Ast.Do(header,body,tail) ->
 927             Ast.Do(rule_elem header, statement body, rule_elem tail)
 928         | Ast.For(header,body,aft) ->
 929             Ast.For(rule_elem header, statement body, aft)
 930         | Ast.Iterator(header,body,aft) ->
 931             Ast.Iterator(rule_elem header, statement body, aft)
 932         | Ast.Switch(header,lb,cases,rb) ->
 933             Ast.Switch(rule_elem header,rule_elem lb,
 934                        List.map case_line cases,rule_elem rb)
 935         | Ast.Atomic(re) -> Ast.Atomic(rule_elem re)
 936         | Ast.Disj(stmt_dots_list) ->
 937             Ast.Disj (List.map statement_dots stmt_dots_list)
 938         | Ast.Nest(stmt_dots,whn,multi,bef,aft) ->
 939             Ast.Nest(statement_dots stmt_dots,
 940                      List.map (whencode statement_dots statement) whn,
 941                      multi,bef,aft)
 942         | Ast.FunDecl(header,lbrace,decls,body,rbrace) ->
 943             Ast.FunDecl(rule_elem header,rule_elem lbrace,
 944                         statement_dots decls,
 945                         statement_dots body, rule_elem rbrace)
 946         | Ast.Define(header,body) ->
 947             Ast.Define(rule_elem header,statement_dots body)
 948         | Ast.Dots(d,whn,bef,aft) ->
 949             Ast.Dots(string_mcode d,
 950                      List.map (whencode statement_dots statement) whn,bef,aft)
 951         | Ast.Circles(d,whn,bef,aft) ->
 952             Ast.Circles(string_mcode d,
 953                         List.map (whencode statement_dots statement) whn,
 954                         bef,aft)
 955         | Ast.Stars(d,whn,bef,aft) ->
 956             Ast.Stars(string_mcode d,
 957                       List.map (whencode statement_dots statement) whn,bef,aft)
 958         | Ast.OptStm(stmt) -> Ast.OptStm(statement stmt)
 959         | Ast.UniqueStm(stmt) -> Ast.UniqueStm(statement stmt)) in
 960     let s = stmtfn all_functions k s in
 961     (* better to do this after, in case there is an equality test on the whole
 962        statement, eg in free_vars.  equality test would require that this
 963        subterm not already be changed *)
 964     process_bef_aft s
 965
 966   and fninfo = function
 967       Ast.FStorage(stg) -> Ast.FStorage(storage_mcode stg)
 968     | Ast.FType(ty) -> Ast.FType(fullType ty)
 969     | Ast.FInline(inline) -> Ast.FInline(string_mcode inline)
 970     | Ast.FAttr(attr) -> Ast.FAttr(string_mcode attr)
 971
 972   and whencode notfn alwaysfn = function
 973       Ast.WhenNot a -> Ast.WhenNot (notfn a)
 974     | Ast.WhenAlways a -> Ast.WhenAlways (alwaysfn a)
 975     | Ast.WhenModifier(x)    -> Ast.WhenModifier(x)
 976     | Ast.WhenNotTrue(e) -> Ast.WhenNotTrue(rule_elem e)
 977     | Ast.WhenNotFalse(e) -> Ast.WhenNotFalse(rule_elem e)
 978
 979   and case_line c =
 980     let k c =
 981       Ast.rewrap c
 982         (match Ast.unwrap c with
 983           Ast.CaseLine(header,code) ->
 984             Ast.CaseLine(rule_elem header,statement_dots code)
 985         | Ast.OptCase(case) -> Ast.OptCase(case_line case)) in
 986     casefn all_functions k c
 987
 988   and top_level t =
 989     let k t =
 990       Ast.rewrap t
 991         (match Ast.unwrap t with
 992           Ast.FILEINFO(old_file,new_file) ->
 993             Ast.FILEINFO (string_mcode old_file, string_mcode new_file)
 994         | Ast.DECL(stmt) -> Ast.DECL(statement stmt)
 995         | Ast.CODE(stmt_dots) -> Ast.CODE(statement_dots stmt_dots)
 996         | Ast.ERRORWORDS(exps) -> Ast.ERRORWORDS (List.map expression exps)) in
 997     topfn all_functions k t
 998
 999   and anything a =
1000     let k = function
1001         (*in many cases below, the thing is not even mcode, so we do nothing*)
1002         Ast.FullTypeTag(ft) -> Ast.FullTypeTag(fullType ft)
1003       | Ast.BaseTypeTag(bt) as x -> x
1004       | Ast.StructUnionTag(su) as x -> x
1005       | Ast.SignTag(sgn) as x -> x
1006       | Ast.IdentTag(id) -> Ast.IdentTag(ident id)
1007       | Ast.ExpressionTag(exp) -> Ast.ExpressionTag(expression exp)
1008       | Ast.ConstantTag(cst) as x -> x
1009       | Ast.UnaryOpTag(unop) as x -> x
1010       | Ast.AssignOpTag(asgnop) as x -> x
1011       | Ast.FixOpTag(fixop) as x -> x
1012       | Ast.BinaryOpTag(binop) as x -> x
1013       | Ast.ArithOpTag(arithop) as x -> x
1014       | Ast.LogicalOpTag(logop) as x -> x
1015       | Ast.InitTag(decl) -> Ast.InitTag(initialiser decl)
1016       | Ast.DeclarationTag(decl) -> Ast.DeclarationTag(declaration decl)
1017       | Ast.StorageTag(stg) as x -> x
1018       | Ast.IncFileTag(stg) as x -> x
1019       | Ast.Rule_elemTag(rule) -> Ast.Rule_elemTag(rule_elem rule)
1020       | Ast.StatementTag(rule) -> Ast.StatementTag(statement rule)
1021       | Ast.CaseLineTag(case) -> Ast.CaseLineTag(case_line case)
1022       | Ast.ConstVolTag(cv) as x -> x
1023       | Ast.Token(tok,info) as x -> x
1024       | Ast.Code(cd) -> Ast.Code(top_level cd)
1025       | Ast.ExprDotsTag(ed) -> Ast.ExprDotsTag(expression_dots ed)
1026       | Ast.ParamDotsTag(pd) -> Ast.ParamDotsTag(parameter_dots pd)
1027       | Ast.StmtDotsTag(sd) -> Ast.StmtDotsTag(statement_dots sd)
1028       | Ast.DeclDotsTag(sd) -> Ast.DeclDotsTag(declaration_dots sd)
1029       | Ast.TypeCTag(ty) -> Ast.TypeCTag(typeC ty)
1030       | Ast.ParamTag(param) -> Ast.ParamTag(parameterTypeDef param)
1031       | Ast.SgrepStartTag(tok) as x -> x
1032       | Ast.SgrepEndTag(tok) as x -> x in
1033     anyfn all_functions k a
1034
1035   and all_functions =
1036     {rebuilder_ident = ident;
1037       rebuilder_expression = expression;
1038       rebuilder_fullType= fullType;
1039       rebuilder_typeC = typeC;
1040       rebuilder_declaration = declaration;
1041       rebuilder_initialiser = initialiser;
1042       rebuilder_parameter = parameterTypeDef;
1043       rebuilder_parameter_list = parameter_dots;
1044       rebuilder_rule_elem = rule_elem;
1045       rebuilder_statement = statement;
1046       rebuilder_case_line = case_line;
1047       rebuilder_top_level = top_level;
1048       rebuilder_expression_dots = expression_dots;
1049       rebuilder_statement_dots = statement_dots;
1050       rebuilder_declaration_dots = declaration_dots;
1051       rebuilder_define_param_dots = define_param_dots;
1052       rebuilder_define_param = define_param;
1053       rebuilder_define_parameters = define_parameters;
1054       rebuilder_anything = anything} in
1055   all_functions
1056